Error 10755 occurs when you are transacting in a currency that is not supported by Paypal. Ensure that the currency you are trying to transact is supported by PayPal by contacting Paypal support.
These are other reasons why this error might occur
1) Paypal has a feature called ‘Block payments in currencies that you do not hold’, ensure it is turned off.
2) Ensure that you have enabled the option to ‘Allow payments sent to me in a currency I do not hold’. This will accept the payments in currencies that you haven’t configured and convert them to U.S. Dollars
Here is more info from the PayPal Documentation.
If you have any further questions, reach out to us at firstname.lastname@example.org.